* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: "Microsoft YaHei", Arial, sans-serif;
    }
    
    body, html {
        margin: 0;
        padding: 0;
        height: 100%;
        overflow: hidden;
        background: linear-gradient(45deg, #ff6b6b, #f7d794, #34ace0, #706fd3);
        background-size: 400% 400%;
        animation: gradientAnimation 15s ease infinite;
        /* display: flex; */
        justify-content: center;
        align-items: center;
        position: relative;
    }
    
    canvas {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: block;
        pointer-events: none;
    }
    
    @keyframes gradientAnimation {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    .login-container {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: rgba(255, 255, 255, 0.95);
        border-radius: 15px;
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        width: 400px;
        max-width: 90%;
        padding: 40px;
        z-index: 1;
        animation: fadeIn 1s ease-in-out;
    }
    
    .logo {
        text-align: center;
        margin-bottom: 30px;
    }
    
    .logo img {
        height: 60px;
        /* 替换为实际logo */
    }
    
    .logo h1 {
        color: #2c3e50;
        margin-top: 10px;
        font-size: 24px;
        letter-spacing: 1px;
    }
    
    .form-group {
        margin-bottom: 25px;
        position: relative;
    }
    
    .form-group i {
        position: absolute;
        left: 15px;
        top: 17px;
        color: #4a90e2;
    }
    
    .form-control {
        width: 100%;
        padding: 15px 15px 15px 45px;
        border: 2px solid #e0e0e0;
        border-radius: 8px;
        font-size: 16px;
        transition: all 0.3s ease;
        background-color: #f9f9f9;
    }
    
    .form-control:focus {
        border-color: #4a90e2;
        box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
        outline: none;
        background-color: #fff;
    }
    
    .btn-login {
        width: 100%;
        background: linear-gradient(to right, #4a90e2, #5cb3ff);
        color: white;
        border: none;
        padding: 15px;
        border-radius: 8px;
        font-size: 16px;
        cursor: pointer;
        transition: all 0.3s ease;
        margin-top: 10px;
        font-weight: bold;
        box-shadow: 0 4px 6px rgba(74, 144, 226, 0.2);
    }
    
    .btn-login:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 12px rgba(74, 144, 226, 0.3);
        background: linear-gradient(to right, #3a80d2, #4ca3ef);
    }
    
    .extra-options {
        display: flex;
        justify-content: space-between;
        margin-top: 20px;
        font-size: 14px;
        color: #7f8c8d;
    }
    
    .remember-me {
        display: flex;
        align-items: center;
    }
    
    .remember-me input {
        margin-right: 5px;
        accent-color: #4a90e2;
    }
    
    .forgot-password {
        color: #4a90e2;
        text-decoration: none;
        transition: all 0.3s ease;
    }
    
    .forgot-password:hover {
        color: #3a80d2;
        text-decoration: underline;
    }
    
    .register-link {
        text-align: center;
        margin-top: 25px;
        color: #7f8c8d;
    }
    
    .register-link a {
        color: #4a90e2;
        text-decoration: none;
        font-weight: bold;
        transition: all 0.3s ease;
    }
    
    .register-link a:hover {
        color: #3a80d2;
        text-decoration: underline;
    }
    
    .security-note {
        text-align: center;
        margin-top: 30px;
        color: #95a5a6;
        font-size: 12px;
    }
    
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translate(-50%, calc(-50% + 20px));
        }
        to {
            opacity: 1;
            transform: translate(-50%, -50%);
        }
    }
    
    @media (max-width: 480px) {
    .login-container {
        padding: 30px 20px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .form-control {
        padding: 12px 12px 12px 40px;
        font-size: 14px;
    }
    
    .btn-login {
        padding: 12px;
        font-size: 15px;
    }
    .vertification {
        display: flex;
        justify-content: space-between;
        margin-top: 20px;
        font-size: 14px;
        color: #7f8c8d;
    }

}